Study of sporadic E layers based on GPS radio occultation measurements and digisonde data over the Brazilian region
This work presents new results about sporadic E-layers (Es layers) using GPS (global positioning system) radio occultation (RO) measurements obtained from the FORMOSAT-3/COSMIC satellites and digisonde data. The RO profiles are used to study the Es layer occurrence as well as its intensity of the...
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2018-04-01
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doaj-a42d7d25e0e04ebb8f5c4bbba9bfd0342020-11-24T21:01:39ZengCopernicus PublicationsAnnales Geophysicae0992-76891432-05762018-04-013658759310.5194/angeo-36-587-2018Study of sporadic E layers based on GPS radio occultation measurements and digisonde data over the Brazilian regionL. C. A. Resende0C. Arras1I. S. Batista2C. M. Denardini3T. O. Bertollotto4J. Moro5J. Moro6National Institute for Space Research (INPE) S. J. Campos, SP, BrazilGerman Research Centre for Geosciences GFZ, Telegrafenberg, Potsdam, GermanyNational Institute for Space Research (INPE) S. J. Campos, SP, BrazilNational Institute for Space Research (INPE) S. J. Campos, SP, BrazilNational Institute for Space Research (INPE) S. J. Campos, SP, BrazilState Key Laboratory of Space Weather, National Space Science Center, China Academy of Science, CAS, Beijing, ChinaSouthern Regional Space Research Center – CRS/COCRE/INPE, Santa Maria, RS, BrazilThis work presents new results about sporadic E-layers (Es layers) using GPS (global positioning system) radio occultation (RO) measurements obtained from the FORMOSAT-3/COSMIC satellites and digisonde data. The RO profiles are used to study the Es layer occurrence as well as its intensity of the signal-to-noise ratio (SNR) of the 50 Hz GPS L1 signal. The methodology was applied to identify the Es layer on RO measurements over Cachoeira Paulista, a low-latitude station in the Brazilian region, in which the Es layer development is not driven tidal winds only as it is at middle latitudes. The coincident events were analyzed using the RO technique and ionosonde observations during the year 2014 to 2016. We used the electron density obtained using the blanketing frequency parameter (<i>fb</i>Es) and the Es layer height (<i>h</i>'Es) acquired from the ionograms to validate the satellite measurements. The comparative results show that the Es layer characteristics extracted from the RO measurements are in good agreement with the Es layer parameters from the digisonde.https://www.ann-geophys.net/36/587/2018/angeo-36-587-2018.pdf |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
L. C. A. Resende C. Arras I. S. Batista C. M. Denardini T. O. Bertollotto J. Moro J. Moro |
spellingShingle |
L. C. A. Resende C. Arras I. S. Batista C. M. Denardini T. O. Bertollotto J. Moro J. Moro Study of sporadic E layers based on GPS radio occultation measurements and digisonde data over the Brazilian region Annales Geophysicae |
author_facet |
L. C. A. Resende C. Arras I. S. Batista C. M. Denardini T. O. Bertollotto J. Moro J. Moro |
author_sort |
L. C. A. Resende |
title |
Study of sporadic E layers based on GPS radio occultation measurements and digisonde data over the Brazilian region |
title_short |
Study of sporadic E layers based on GPS radio occultation measurements and digisonde data over the Brazilian region |
title_full |
Study of sporadic E layers based on GPS radio occultation measurements and digisonde data over the Brazilian region |
title_fullStr |
Study of sporadic E layers based on GPS radio occultation measurements and digisonde data over the Brazilian region |
title_full_unstemmed |
Study of sporadic E layers based on GPS radio occultation measurements and digisonde data over the Brazilian region |
title_sort |
study of sporadic e layers based on gps radio occultation measurements and digisonde data over the brazilian region |
publisher |
Copernicus Publications |
series |
Annales Geophysicae |
issn |
0992-7689 1432-0576 |
publishDate |
2018-04-01 |
description |
This work presents new results about sporadic E-layers (Es layers) using
GPS (global positioning system) radio occultation (RO) measurements obtained
from the FORMOSAT-3/COSMIC satellites and digisonde data. The RO profiles are
used to study the Es layer occurrence as well as its intensity of the
signal-to-noise ratio (SNR) of the 50 Hz GPS L1 signal. The methodology was
applied to identify the Es layer on RO measurements over Cachoeira Paulista, a
low-latitude station in the Brazilian region, in which the Es layer
development is not driven tidal winds only as it is at middle latitudes. The
coincident events were analyzed using the RO technique and ionosonde observations during the
year 2014 to 2016. We used the electron density obtained using
the blanketing frequency parameter (<i>fb</i>Es) and the Es layer height
(<i>h</i>'Es) acquired from the ionograms to validate the satellite measurements.
The comparative results show that the Es layer characteristics extracted
from the RO measurements are in good agreement with the Es layer parameters
from the digisonde. |
url |
https://www.ann-geophys.net/36/587/2018/angeo-36-587-2018.pdf |
work_keys_str_mv |
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